The HSA 66 STIHL Lithium-Ion hedge trimmer offers professional-grade power and all the convenience of the STIHL Battery-Powered Equipment: No gasoline. No cord. No exhaust emissions. This cordless hedge trimmer is powered by 36-volt STIHL Lithium-Ion battery technology and runs up to 40% longer than the previous model. It is also a full pound lighter than the previous model, making it even easier ...Read More

Two-Handed Design
Equipment with this feature is easily started by activating switches on the loop handle and the rear handle at the same time. The cutting speed can be adjusted using the rear trigger control, allowing for a fine and precise cut. The two-handed design is suitable for both left and right-handed users.

Ergonomic Loop Handle
The ergonomic loop handle is ideal for making cuts in any direction.

Tip Protector
The tip protector makes cutting near the ground or along walls easier while protecting the trimmer’s cutters from damage.

Functional Design
The engine housing has smooth surfaces and round contours that help to keep it from getting caught on branches during use. The design also makes cleaning easy.

Important Information

Note: STIHL engine products with the Caring for Nature logo are cleaner than EPA Standards for exhaust emissions.

WARNING! Improper use of any power tool may cause serious
or fatal injury. Read, understand and follow carefully the operating
and safety instructions in your instruction manual before using such products.

STIHL products sold through U.S. STIHL Dealers are for distribution in the United States only.

We Also Suggest

Part of the STIHL Lithium-Ion Battery KombiSystem, the AL 500 delivers the fastest charging time for all STIHL Lithium-Ion batteries. Now, you can spend less time charging and complete your projects faster. The AL 500 will even charge the high-capacity AR 900 backpack battery in less than 2 hours. Get the most out of your STIHL system – get the AL 500 high-speed charger!

The AP 300 Lithium-Ion battery is the most powerful handheld battery in the STIHL line – 28% more power than the AP 180, while remaining the same weight (3.8 lbs.). And all STIHL batteries are based on 36-volt Lithium-Ion technology, hitting the “sweet spot” of power and run time. They are also engineered to last, keeping 80% of their battery capacity after 500 charges. The AP 300 even features specialized voltage monitors and temperature sensors to help ensure optimal operation and a long service life. Have questions? Contact us today and we’ll help you find the right battery equipment for your needs.

Are You Ready for a STIHL?

Reserve with STIHL Express for In-Store Pick Up

With STIHL Express, you can reserve the STIHL product you need right from your home or office and pick it up at your local STIHL Dealer.

Compare STIHL products online 24 hours a day, 7 days a week.

Pick up products assembled and ready to go

Get the ease of reserving online while still having access to advice from your local STIHL Dealer.

Distributor Suggested Retail Price

All pricing on this site is Distributor Suggested Retail Price. This site strives to maintain accurate and current suggested retail pricing. However, dealers' actual prices may vary or change. Please confirm pricing with your dealer

Buy Now for Home Delivery

STIHL OUTFITTERS™ goods are sold and shipped by authorized STIHL OUTFITTERS™ Licensees. Ordering online is easy and items can be delivered directly to your address.

Show off your STIHL pride today!

HSA 66 Description

The HSA 66 STIHL Lithium-Ion hedge trimmer offers professional-grade power and all the convenience of the STIHL Battery-Powered Equipment: No gasoline. No cord. No exhaust emissions. This cordless hedge trimmer is powered by 36-volt STIHL Lithium-Ion battery technology and runs up to 40% longer than the previous model. It is also a full pound lighter than the previous model, making it even easier to use and maneuver when on the job. The HSA 66 is also four times quieter than its gasoline-powered equivalent. The tooth spacing and diamond-ground blade edges mean cleaner cuts, and with high cutting speeds, professionals can complete more hedge trimming in a short amount of time.

Batteries and chargers must be purchased separately. Run time may vary based on battery type, charge level and capacity, model, operating style and conditions.

HSA 66

HSA 66

Please provide your email to receive this special offer.

*Please Note: STIHL does not rent, sell or share personal information about you with other people or nonaffiliated companies.

Thank You!

Thank you! You will now receive this special offer within your email, so that it may be printed and redeemed in-store.

HSA 66 is rated 4.7 out of 5 by 11.

Rated 5 out of 5 by Patrick17 from Great little unitI am super happy I bought this. Cuts very well and the battery life will surprise you how long it lasts.No more cut electrical cords and smelly gasoline.

Date published: 2017-08-04

Rated 5 out of 5 by Rick43 from This hedge trimmer preformed a lot better than I thought it would.I bought this trimmer to trim balsams and bushes around the yard. My wife used it for cutting down weeds in her butterfly garden. She wanted to know why I didn't get one sooner. Used it only 4 time so far however, being a Stihl product I expect it to perform well for a long time. It is slick.

Date published: 2017-07-07

Rated 5 out of 5 by MrInsuranceBrokerSF from Not like the cheap pretendersNo negatives. Battery is a workhorse, and also re-charges very quickly.

Date published: 2017-06-07

Rated 2 out of 5 by Chuck6020 from Ergonomics were an afterthoughtI waited one year to write this so I would have a full opportunity to adapt to the product. Using the AP180 with this model provides to charge that outlasts the stamina of anybody doing hedge trimming. However, the trimmer is horribly nose heavy so the fatigue quickly builds up.Also, the safety engineer added an interlock to the front handle that increases fatigue as you must apply a firm grip on the interlock to operate the trimmer. This increases fatigue especially when trimming the sides of hedges where grip pressure has to increase to overcome the interlock. The quick fix is to wrap tape around this interlock to defeat it. I'd rather see it go away reducing trimmer weight and cost.While the trimmer has plenty of power, the bar length is too short (20") and tooth spacing is too narrow for many applications. These are areas that Stihl could easily be corrected with parts from the gasoline models.After buying this I quickly invested in the HLA85 and I'd rather use it in most applications. While it's a little heavier, the balance on it is far superior.

Date published: 2017-05-21

Rated 5 out of 5 by Don70 from This product has performance plusI am impressed by the performance and ease of use with the battery power and longevity. This unit has exceeded my expectations.

Date published: 2017-03-28

Rated 5 out of 5 by SeattleRob from Been down under and back with my StihlWe have a steep slope (AKA cliff) behind our house that gets heavy brush overgrowth that has to be taken back regularly. I repel down and go for it. There is no other tool to use. My Stihl HSA 66 makes quick work of the entire job, including those pesky alder saplings, up to 3/4", no problem. My wife calls it "down under and back".Oh and there's our 20 foot tall Leylandii Cypress hedge. No problem. Straight as an arrow, flat as a board. The hedge, I mean.

Date published: 2016-09-19

Rated 5 out of 5 by mimi from best in the fieldlight weight yet powerful...works great...holds a charge for extended time...

Date published: 2016-08-13

Rated 5 out of 5 by Dano65 from Good power, battery fully charged in less than 10 minutesGood power, cut through a tough hedge with 3/4 in branches in some spots and did not bog down.The blade is extremely sharp, probably sharper than all the knives in my drawer. It was so sharp it scared my wife and she said she wasn't going to use it.After she saw me cut through the hedge she couldn't wait and asked me to leave one for her.

STIHL News

Follow STIHL USA on

STIHL IS THE NUMBER ONE SELLING BRAND OF GASOLINE-POWERED HANDHELD OUTDOOR POWER EQUIPMENT IN AMERICA.*

*"Number one selling brand" is based on syndicated Irwin Broh Research as well as independent consumer research of 2009-2016 U.S. sales and market share data for the gasoline-powered handheld outdoor power equipment category combined sales to consumers and commercial landscapers.

*A majority of STIHL gasoline-powered units sold in the United States are built in the United States from domestic and foreign parts and components.